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9130 UPS-EN
ENGLISH
4. Operation
4.5 Retrieving the Event Log
To retrieve the Event Log through the display:
1. Press any button to activate the menu options, then select EVENT LOG.
2. Scroll through the listed events.
To retrieve the Event Log through the serial port:
1. From the communication device connected to the serial port, send one of the following command
sequences: ESC-L (ASCII characters 27 and 76) or ESC-I (ASCII characters 27 and 108).
The UPS returns a header containing the UPS identification (UPS type, part number, and serial
number), firmware version, and the current date and time, followed by the event history.
2. Use the connected communication device to view or print the information. The report is delivered in
ASCII format.
4.6 Setting Power Strategy
On the High Efficiency setting, the UPS operates normally on Bypass, transfers to inverter in less than
10 ms when utility fails, and transfers back to Bypass in 1 minute after utility returns.
High Efficiency operation is available after one minute of stable power.
To set the power strategy:
1. Press any button to activate the menu options, then select SETTINGS, USER SETTINGS, and POWER
STRATEGY.
2. Select HIGH EFFICIENCY or NORMAL, and ENTER to confirm.
4.7 Configuring Bypass Settings
The following settings are available for configuring Bypass operation.
Transfer to Bypass When Overload. The default forces a transfer to Bypass when any overload
condition occurs. You can configure the setting for a delayed transfer, with the amount of delay
determined by the amount of overload, as shown in table 20 on page 32.
Bypass Voltage Low Limit. The default disables a transfer to Bypass if the measured bypass voltage
level is below the nominal output voltage minus 15 %. You can configure the setting for another
percentage of nominal. This setting can be overruled by the "Qualify Bypass" setting.
Bypass Voltage High Limit. The default disables a transfer to Bypass if the measured bypass voltage
level is above the nominal output voltage plus 10 %. You can configure the setting for another
percentage of nominal. This setting can be overruled by the "Qualify Bypass" setting.
Qualify Bypass. The default allows a transfer to Bypass only when Bypass is within the following
specifications:
Bypass voltage is between the "Bypass Voltage Low Limit" and "Bypass Voltage High Limit" l
settings.
Bypass frequency is within nominal frequency ±3 Hz. l
the inverter is synchronized with Bypass when the "Unsynchronized Transfers" setting is l
disabled.
You can prohibit Bypass ("Never") or always allow Bypass with no specification checking ("Always").
For "Always on UPS Fault", transfer to Bypass is always made on UPS fault; otherwise, operation
proceeds as with the default setting.
Synchronization Window. The UPS tries to synchronize with Bypass when the Bypass frequency is less
than the value set for the "Synchronization Window" setting. When the Bypass frequency is more than
the set value, the UPS goes to nominal frequency. On Bypass the synchronization window is ±3 Hz. If
synchronization is disabled ("Sync Disabled"), the UPS will synchronize only when operating on Bypass.
Unsynchronized Transfers. The default allows an unsynchronized transfer to Bypass. You can configure
the setting to not allow such transfers. This setting can be overruled by the "Qualify Bypass" setting.
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